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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "sludge/graphics.h"
#include "sludge/allfiles.h"
namespace Sludge {
extern int sceneWidth, sceneHeight;
#if 0
extern GLuint backdropTextureName;
#endif
void drawLine(int x1, int y1, int x2, int y2) {
int x, y;
bool backwards = false;
#if 0
if (x1 < 0)
x1 = 0;
if (y1 < 0)
y1 = 0;
if (x2 < 0)
x2 = 0;
if (y2 < 0)
y2 = 0;
if (x1 > sceneWidth)
x1 = sceneWidth - 1;
if (x2 > sceneWidth)
x2 = sceneWidth - 1;
if (y1 > sceneHeight)
y1 = sceneHeight - 1;
if (y2 > sceneHeight)
y2 = sceneHeight - 1;
if (x1 > x2) {
x = x2;
backwards = !backwards;
} else
x = x1;
if (y1 > y2) {
y = y2;
backwards = !backwards;
} else
y = y1;
int diffX = abs(x2 - x1);
int diffY = abs(y2 - y1);
if (!diffX) {
diffX = 1;
if (x == sceneWidth - 1)
x = sceneWidth - 2;
}
if (!diffY) {
diffY = 1;
if (y == sceneHeight - 1)
y = sceneHeight - 2;
}
setPixelCoords(true);
glLineWidth(2.0);
int xoffset = 0;
while (xoffset < diffX) {
int w = (diffX - xoffset < viewportWidth) ? diffX - xoffset : viewportWidth;
int yoffset = 0;
while (yoffset < diffY) {
int h = (diffY - yoffset < viewportHeight) ? diffY - yoffset : viewportHeight;
// Render the scene - first the old backdrop
glBindTexture(GL_TEXTURE_2D, backdropTextureName);
//glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
const GLfloat vertices[] = { (GLfloat)-x - xoffset, (GLfloat)1 - y - yoffset, 0., (GLfloat)sceneWidth - x - xoffset, (GLfloat)1 - y - yoffset, 0., (GLfloat)-x - xoffset,
(GLfloat)sceneHeight - y - yoffset, 0., (GLfloat)sceneWidth - x - xoffset, (GLfloat)sceneHeight - y - yoffset, 0. };
const GLfloat texCoords[] = { 0.0f, 0.0f, backdropTexW, 0.0f, 0.0f, backdropTexH, backdropTexW, backdropTexH };
glUseProgram(shader.texture);
setPMVMatrix(shader.texture);
drawQuad(shader.texture, vertices, 1, texCoords);
// Then the line
//FIXME:Removing the lines doesn't work, but also didn't work properly before.
GLint xo1 = -xoffset, xo2 = -xoffset;
if (!backwards) {
xo2 += diffX;
} else {
xo1 += diffX;
}
const GLint lineVertices[] = { xo1, -yoffset, 0, xo2, -yoffset + diffY, 0, };
glUseProgram(shader.color);
setPMVMatrix(shader.color);
glUniform4f(glGetUniformLocation(shader.color, "myColor"), 0.0f, 0.0f, 0.0f, 1.0f);
int vertexLoc = glGetAttribLocation(shader.color, "myVertex");
glEnableVertexAttribArray(vertexLoc);
glVertexAttribPointer(vertexLoc, 3, GL_INT, GL_FALSE, 0, lineVertices);
glDrawArrays(GL_LINES, 0, 2);
glDisableVertexAttribArray(vertexLoc);
glUseProgram(0);
// Copy Our ViewPort To The Texture
copyTexSubImage2D(GL_TEXTURE_2D, 0, x + xoffset, y + yoffset, viewportOffsetX, viewportOffsetY, w, h, backdropTextureName);
yoffset += viewportHeight;
}
xoffset += viewportWidth;
}
setPixelCoords(false);
#endif
}
} // End of namespace Sludge
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